DS1747P 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS1747P

Y2K-Compliant, Nonvolatile Timekeeping RAMs

Dallas Semiconductor -> Maxim Integrated 

DS1747/DS1747P Y2K-Compliant, Nonvolatile Timekeeping RAMs

DC ELECTRICAL CHARACTERISTICS

(VCC = 3.3V ±10%, TA = Over the Operating Range.)

PARAMETER

SYMBOL MIN

Active Supply Current

Icc

TTL Standby Current

( CE = VIH)

CMOS Standby Current

( CE ³ VCC - 0.2V)

Input Leakage Current

(Any Input)

Output Leakage Current

(Any Output)

Output Logic 1 Voltage

(IOUT = -1.0 mA)

Output Logic 0 Voltage

(IOUT = +2.1 mA)

Write Protection Voltage

Icc1

Icc2

IIL

-1

IOL

-1

VOH

2.4

VOL

VPF

2.80

Battery Switchover Voltage

VSO

TYP

VBAT

or

VPF

MAX

30

2

2

+1

+1

0.4

2.97

UNITS

mA

mA

mA

mA

mA

V

V

NOTES

2, 3

2, 3

2, 3

1

1

1

1, 4

AC CHARACTERISTICS—READ CYCLE (5V)

(VCC = 5.0V ±10%, TA = Over the Operating Range.)

PARAMETER

SYMBOL MIN TYP

Read Cycle Time

tRC

70

Address Access Time

tAA

CE to DQ Low-Z

tCEL

5

CE E Access Time

tCEA

CE Data Off Time

OE to DQ Low-Z

tCEZ

tOEL

5

OE Access Time

tOEA

OE Data Off Time

tOEZ

Output Hold from Address

tOH

5

MAX

70

70

25

35

25

UNITS

ns

ns

ns

ns

ns

ns

ns

ns

ns

NOTES

8 of 18

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